Comparison between H2 and H∞ Optimal Control Solutions for a Combined Energy and Attitude Control System

The paper focuses on applying optimal control solutions to combined energy storage and attitude control system (CEACS) under different reference missions. In previous researches, the proportional-integral-derivative (PID) control method, the PID-active force control method and H2 control were tested for CEACS and achieved its mission requirement. However, problems such as the in-orbit system uncertainties affect the PID control performances. Thus, two optimal control methods, H2 and H∞ controls are proposed and tested on CEACS under different mission scenarios to improve its pitch attitude accuracy. Results show that both H2 and H∞ are able to achieve the reference mission requirement even under the influence of uncertainties (non-ideal). Moreover comparison between H2 and H∞ shows the H2 is a better control option for CEACS in terms of disturbance rejection.

[1]  Michael Ovchinnikov,et al.  H2 optimal control solution for a combined energy and attitude control system , 2012 .

[2]  C M Roithmayr International Space Station Attitude Control and Energy Storage Experiment: Effects of Flywheel Torque , 1999 .

[3]  K. Glover,et al.  State-space formulae for all stabilizing controllers that satisfy and H ∞ norm bound and relations to risk sensitivity , 1988 .

[4]  Renuganth Varatharajoo,et al.  Architecture for Combined Energy and Attitude Control System , 2005 .

[5]  P. Khargonekar,et al.  State-space solutions to standard H2 and H∞ control problems , 1988, 1988 American Control Conference.

[6]  Renuganth Varatharajoo Onboard errors of the combined energy and attitude control system , 2006 .

[7]  Jeffrey B. Burl,et al.  Linear Optimal Control: H(2) and H (Infinity) Methods , 1998 .

[8]  Renuganth Varatharajoo,et al.  Attitude Performance of the Spacecraft Combined Energy and Attitude Control System , 2004 .

[9]  Renuganth Varatharajoo A combined energy and attitude control system for small satellites , 2004 .

[10]  Renuganth Varatharajoo Operation for the combined energy and attitude control system , 2006 .

[11]  Renuganth Varatharajoo,et al.  Two degree-of-freedom spacecraft attitude controller , 2011 .

[12]  Renuganth Varatharajoo,et al.  A review of conventional and synergistic systems for small satellites , 2005 .

[13]  P. Khargonekar,et al.  State-space solutions to standard H/sub 2/ and H/sub infinity / control problems , 1989 .

[14]  Christopher D. Hall,et al.  Satellite Attitude Control and Power Tracking with Energy/Momentum Wheels , 2001 .

[15]  Renuganth Varatharajoo,et al.  Methodology for the development of combined energy and attitude control systems for satellites , 2002 .